[SossMan]

It's not really how many chips you start with, but rather more a question of how deep the stacks are in relation to the blinds.
I would much rather play in a tournament that started with 1000 in chips with blinds of 10-20 than a tourney that gave you 1500 chips and started with blinds of 25-50.

As far as adjustments....the deeper the stacks, the more implied odds there are. In general, you can play more hands, but have to be able to get off more hands postflop as well. Deep stacks allow more play and allow the better player to make the weaker players make bigger mistakes.